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Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1965 1
1966 2
1967 7
1968 10
1969 10
1970 7
1971 8
1972 5
1973 5
1974 11
1975 8
1976 10
1977 11
1978 13
1979 15
1980 24
1981 10
1982 25
1983 25
1984 19
1985 22
1986 27
1987 28
1988 34
1989 45
1990 54
1991 60
1992 70
1993 107
1994 87
1995 92
1996 95
1997 77
1998 79
1999 94
2000 94
2001 82
2002 95
2003 120
2004 141
2005 158
2006 158
2007 168
2008 189
2009 243
2010 273
2011 342
2012 329
2013 332
2014 356
2015 400
2016 380
2017 388
2018 364
2019 409
2020 436
2021 447
2022 355
2023 289
2024 115

Text availability

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Article type

Publication date

Search Results

6,879 results

Results by year

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6,879 results